Really good point from @AndyGraham there — age and condition are often overlooked. One thing I'd add is that the Orion-Tr Smart's engine running detection via the input voltage threshold is worth...
Something worth adding to what @Keith1977 and others have touched on — have you checked your State of Charge readings against actual resting voltage after a full charge cycle?
LochStu | Posts: 412
@MountainBarry worth noting that the lower voltage cells (your 2.8V ones) aren't necessarily deeply discharged — LiFePO4 has such a flat discharge curve that a small voltage...
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